Typewriting machine



V March 24, 1925.

. B. M. DES JARDINS TYPEWRITING MACHINE Filed April 12. 1921 Patented Mar. 24, 1925.

BENJAMIN M. DESJARDINS, or wns'r HARTFORD,

3 1,530,885 PATENT OFFICE.

CONNECTICUT, ASSIGNO'R TO UNDER- .WOOD TYPEWRITER GOMPANY, F NEWYOR-K, N. Y., A CORPORATION OF DELA WARE.

TYPEWRITING MACHINE.

Application filed April 12, 1921. Serial No. 460,680.

To all whom it may concern:

Be it known that I, BENJAMIN M. DES JARDINS, a citizen of the United States, residing in W'est' Hartford, in the county of s'liartfordand State of Connecticut, have invented certain new and useful Improvements in Typewriting.Machines, of which the following is aspecification.

This invention relates to means for retard.

1o ing or regulating the speed of the typewriter carriage when tabulating is being effected, and'is herein illustrated as applied to an Underwood standard typewriter.

The main object of the invention is to provide a simple and eflicient carriage-retarding or speed-regulating device readily applicable to machines of standard form and adapted to prevent undue shock upon stopping the carriage at the end of a tabulating movement. I

A feature of-the invention consist in mounting the retarding device on the springdrum of the carriage-feedingmechanism.

4 -Another feature of'the invention consists to inproviding a retarding device rotatable with. the spring-drum and having two relatively rotatable frictional elements, the fric tional resistance between said elements determining the extent of theretarding action so on the spring-drum.

Another feature consists in the provision of means to regulate the frictional resistance between the frictional elements of the retarding device.

.in the provision of a retarding which, when effective, the typewriter carriage is retarded, first by a spring, and then, when the resistance of the spring has been overcome, by a frictional retarding means.

Another feature of .the invention consists in the provision" of a retarding device, wherebya comparatively light resistance is offered to the carriage for a given distance, and then the carriage is subjected to a greater 5 resistance.

A further feature consists in the provision of means to determine the extent of travel of the typewriter carriage during which the retarding action is effected by the spring.

In carrying out the invention, a pawl 'is connected with the rocking frame on which the column-stops.ar e set in the tabulatin' mechanism of the Underwood standard type- Another feature of the invention consists device by writer, and, uponmovement ,of at abulator- 'key, the carriage will be. releasedand the pawl or stop will be moved into position to engage a tooth of a ratchet-wheel forming part of a retarding device mounted on the spring-drum of the carriage-feeding mechanism. turn with the spring-drum until a stop of a member adjacent the ratchet-wheel engages a stop of the ratchet-wheel. During this action, the movement of the, spring-drum is resisted by a light spring. From this time, the member referred to will be held against actuation, and, until the tabulating action is completed, the spring-drum will turn relatively to said member against the frictional resistance between an element ofwhich said member is a part and an elementconnected to the spring-drumto turn therewith. Adjusting means may be provided to determine the extent of movement of said member with'reference to the ratchet-wheel, and means may also be provided for regulating the frictional resistance to the turning of the spring-drum. I 4

Other features and advantages will hereinafter appear.

In the accompanying drawings, H

Figure 1 isa fragmentary side view of an Underwood typewriter, showing my invention applied thereto.

Figure 2-is a front view of the retarding device, partly in section, showing the parts in their normal positions.

The rest of the retarding device will Figure 3 is an enlarged sectional sideview of the retarding device in separated relation, but showing the relative positioning of the parts.

Figure 5 is a view similar to Figure 2, but showing the position of the parts at the time @when the frictional device becomes effective to retard the spring-drum. Upon depression of a tabulator-key 10, the key-lever 11 will be rocked about its pivot 12, .and, by meansof a pin 13 thereon engaging in a slot in. the lowerend of a link 14 pivoted at its upper end to an ear 15 fastened to a shaft 16. of a rocking frame 17, will swing the latter forwardly to effective position. c The frame-17 also includesarms 18fix'ed g I on the shaft 16 and connected at their upper ends by meansof a bar 19. A rod 20 also extends from end to end of the frame 17 above the shaft 16, and serves to support one or more column-stops 21, which are slidable therealong. Each column-stop 21, when brought to a suitable position, may be rocked forwardly on the rod 20 to bring teeth 22 thereon into notches in" the lower edge pf bar 19, the stop, when in forward position, being retained by any suitable means, such as a spring-pressed ball (not shown) mounted in the stop in position to engage the groove 23 in rod when the stop is in effective position. v V

Upon the forward swinging of frame 17, the forwardly-projecting portion of an effectivelypositioned column stop will be brought into the path of a. co-operating stop 24: on the typewriting carriage 25, the forward movement of the frame being limited by any suitable means, such as a stop pin 18,

in the path of one of the arms 18. At the same tlme,-an arm 26 secured by any suitable means to the lower face ofthe'shaft 16,

which is square throughout the greater part of its len th, will press downwardly on the rearwar y-extendmg arm of a lever 27, and swing the latter about its pivot 28 to lift a roller 29 jour'naled on the forward end of the lever 27. Upon this roller 29 rests a rack bar 30 pivotally supported on the carriage 25 by means of. arms 31 and normally in mesh with a. pinion 32 of the usual Underwood escapement mechanism, comprising an escapement wheel and fast and loose dogs. It will be apparent that the roller 29, in its upward movement, will lift the rack bar 30 onto}? engagement with pinion 32 and release the carriage, so that the latter will be drawn in a letter-feed direction by means of a strap 33 connected thereto and to the usual spring-drum 34. The mechanism described up to the present point" is in general similar to that disclosed in the patent to H. Crutch-r for a purpose to. be described hereinafter. Forward of the ball-bearings'36, a. sleeve 42 is mounted on a reduced portion of shaft 35, and is held iii-position thereon by means I of a screw i3, threaded into the end of the shaft. For the purpose of actuating springdrum 34, provision is made of a spring 44,

. having its inner end secured to the sleeve 42 by a suitable means, such as a rivet 45, and

the spring may be secured to the springdrum 34%, at its periphery, by any suitable means, such as a rivet 46. It Wlll. be evident that, by turning the shaft by means of the handle 40, the tension of the spring 44 may be re lated, and that the shaft 35 may bemaintained in such adjusted osition by means of the dog" 39 engaging t e ratchetwheel 38.

- According to the present invention, a

carriage-retarding or speed-regulating device- 47 may be attached to the head 48 of the spring-drum 34. For this purpose, the retarding device 47 comprises a base-plate 49 and a stud 50 projecting therefrom, by which the other parts of the speed-retarding device are supported. The late 49 may be secured'to the head 48 of t e spring-drum by any suitable means, such as'screws 51, and the-stud 50 may be secured to the plate- 49 in any suitable manner, such as, for example, by passing a reduced portion of the stud through a corresponding opening in the plate 49 and upset-ting the rearwardly-projecting portion, so asto fill .a conical depression on the rear face of said plate 49,- the upset portion in its finished form being flush with the rear surface of said plate.

Provision may be made of a pluralilg of flat plates or d1sks52, loosely mounte on stud 50, and of dished lates or disks 53 between said plates 52 and having square openings 53" to fit over'a square portion 54 of the stud 50. It will be evident that the plates or disks 53 maybe moved along he stud 50, but will be held against rotation thereon. Provision may also be made of a late 55 of substantially the same size as t e rearmost plate 52, and of spacing sleeves 56,

placed therebetween, through which are passed screws 57, inserted through openings 58 in-the rearmost plate 52, and threaded into openings 59 in the plate 55. As a result of this arrangement, the rea-rmost plate 52 and the plate 55 will always be held at the same distance apart. The remaining plates are somewhat smaller than the rear plate 52, and are provided with recesses 60 in their edges to receive the spacing sleeves 56,

relative rotation, but may be moved to and 'from.each other. A sleeve 61 may be placed over the stud 50 with its inner end against the. outermost plate, and, by means of a 'washer 62 placed at the outer end of sleeve whereby the plates 52 be held against" that the retarding device in so far as it has been described consists of two co-operating friction elements, one comprising base-plate 49 and plates 53, and the other comprising disks or plates. 52.

The plate55 at the front of the sets of friction elements has integrally formed upon it a forwardly projecting sleeve 65 fitfing'over the sleeve 61, and acting as a. bearlie in the ing for a sleeve 66 extending rearwardly from a ratchet-wheel 67, the sleeve 66 and the ratchet-wheel67 being held in position on sleeve by lugs 68 on the latter bent outwardly to engage the outer surface of the ratchet-wheel. The ratchet wheel 67 is yieldably connected with the plate 55 by means of a spring 69, fixed at one end in 5. lug 70 on the plate and at the other end to a hook 71 on the sleeve 66 fixed to the ratchet-wheel 67. Normally, the spring 69 holds the lug 70 on the front face of the plate or disk 55 in engagement with a lug 72 on the rear face of the ratchet-wheel 67, as shown in Figure 2.

In order to limit the relative movement between the ratchet-wheel 67 and the plate 55 in the opposite direction, provision may be made of a suitable stop on the rear face of the ratchet-wheel 67 at such a distance from the center of the ratchet-wheel as to this stop may consist of the head 73 of a screw 74 projecting through an arcnate slot 75 inthe ratchet-wheel 67, the slot-75 being concentric with the center of the ratchetwh-eel and at a suitable distance therefrom. In order to secure the screw'74 at any de-' sired point in the slot 75, provision may be made of a washer 76 carried by'said screw at the front of the-ratchet-wheel and a knurled head or nut 77 threaded on the screw.

To render the retarding device47 effective when the tabulating mechanism is operated, provision may be made of an arm 78 secured to the shaft 16 by any suitable means, such as a screw 79, andhaving its forward end overlying the ratchet-wheel at one side thereof, as shown in Figures 2 and 5. At its forward end the arm 78 is provided with downwardly-extending lugs 80 on opposite sides thereof, and, upon a pivot 81, supported by'said lugs, is pivoted a pawl 82 having a tooth 83 lying adjacent the teeth of the ratchet-wheel 67 and slightly at the front thereof. At a point adjacent the-lugs 80, the pawl 82 is bent rearwardly substantially at a right angle, and is provided with upwardly-extending lugs' 84 through which pivot 81 passes. The pawl 82 is yieldably urged toward the ratchetwheel by means of a spring 85 coiled about thepivot 81 and having engagement with the arm 78 and the pawl 82, respectively, the rearward movement of the pawl 82 with reference to the arm 78 being limited by a lug 86 extending upwardly from the substantially horizontal portion of the pawl 82, and normally engaging the arm 78, as shown in Figure 3.

Upon. operation of the tabulating mechanismaby means of the tabulator-key 10, the arm 78 will be swung downwardly and the pawl 82 will be moved rearwardly to enpath of the lug 70.. Preferably gage with the teeth 67 of the ratchet-wheel 67. At the same time, the carriage 25 will be released from the escapement mechanism, and the spring-drum 34 will begin to rotate to movc the carriage in a letter-feed direction. If the tooth 83 of the pawl 82 is properly positioned with reference to the teeth 67 of the ratchet-wheel, it will immediately'engage the lower edge of one of the teeth, as indicated in Figure 5, and the ratchet-wheel 67 will be held against movernent. If, however, the tooth 83 in its'rearward movement engages the side of a tooth 67 of the ratchet-wheel, the spring 85 will yield, and, upon a movement of the ratchetwheel in counter-clockwise direction, as shown in Figures 2 and 5, the tooth 83, which is shown in obstructed position m Figure 2, will engage the next tooth 67 of the ratchet-wheel as the latter is turned with the spring-drum 34.

Upon he establishment of an effective engagement between the tooth 83 of the pawl 2 and a tooth of the ratchet-Wheel 67, the ratchet-wheel will' be held against movement, and, as the plate 55' is turned with the spring-drum against the tension of the spring 69, the lug 70 on the front face of the plate 55 will be moved from the position indicated in'Figure 2until it engages the screw-head 73, as indicated in Figure 5. The plate 55 will then be held against movement by means of the ratchet-wheel 67, and the friction element, of which plate 55 forms a part, will be held stationary, there by exerting a braking action on the other friction element, including the base-plate 49 and the plates or disks 53, thereby retarding the spring-drum 34 and regulating the speed of the same.

tabulating movement of the spring-drum, the carriage will be retarded only by the light resistance'due to the spring 69, and that, upon engagement of the lug 70 with the screw-head 73, the movementof the carriage and spring-drum will be retarded by the greater resistance exerted between the friction elements of the retarding device. Consequently undue delay in starting the tabulating movement of. the carriage will be avoided, and at the same time a sufii-' cient retarding action to prevent too great impact of the stop at the" rear of the carriage against the next operatively positioned column-stop will be obtained.

Variations may be resorted to within the nation with a carriage, meansi'ncluding a spring-drum to urge the carriage in a letter-feeding direction, escapeme'nt mechanism and rendered efiective by said tabulating mechanism, said'retarding means comprising spring means offering a slight resistance to the action of the spring-drum and frictional means eifectivewhen the resistance of said spring means has been overcome.

2. In a typewriting machine, the combination with a carriage, means including a springdrum to urge the-carriage in a letterfeeding direction, escapemnt mechanism to control the carriage and tabulating'mechanism incliiding means to release the carriage from the escapement mechanism, of normally ineffective retarding means fastened to and moving with the spring-drum and rendered effective by said tabulating mechanism,the resistance of said retarding means being slight during a preliminary movement of the spring-drum, and being much stronger during the rest of the movement of. the spring-drum.

3. In a typewriting machine, the combination with a carriage, means including a spring-drum to urge the carriage in a letterfeeding direction, esc'apement mechanism to control the carriage and tabulating mechanism includingmeans to release the carriage from the escapement mechanism, of by said tabulating mechanism normally ineffective retarding means fastened to andmoving with the spring-drum and rendered effective by said tabulating mechanism, said retarding means comprising 7 a weak resistance device effective in the preliminary movement of the springdrum'and a strong resisting device thrown into action at the end of such preliminary movement.

4. In a typewritingmachine, incombination, a carriage, feeding means therefor including a springdrum, and retarding means for said spring-drum moving idly therewith and comprismg two co-operating friction elements, means for actuating of said friction elements by the springrum, and means normally inefiective to hold the other of said elements against; movement gut capable of being rendered efiectiveto 5. In a typewriting machine, in combination, a carriage,carriage-urging means in-' cluding a spring-drum, a retarding device fastened to the drum and normally rotating idly therewith, a tabulating mechanism, and means actuated by the tabulating mechanism for rendering said retarding device effective.

6. In a typewriting machine, in combina comprising two co-operating friction eleso that the device will normally rotate idly therewith, tabulating mechanism, and means actuable by the tabulating mechanism to check the movement of the second element and thereby render said device eifective.

7 In a typewriting machine, in combina-- tion, a carriage, carriage-urging means including a spring-drum, a retarding device mounted on said drum, Icomprising two co operating friction element-s, one of which is secured to the drum so that the device normally rotates idly therewith, a controlling member, a. spring connection between said controlling member and the second element, and means to limit the movementbetween said member and the second element,,tab-

'ments, one of which is secured to thc drilm ulating mechanism, and means actuable by 7 said tabulating mechanism to check said controlling member, the second element then moving with respect thereto until its limiting position is reached, whereupon the movement of the carriage will be resisted by the friction between said elements.

8. In a typewriting machine, the combination with a carriage, means to'urge the carriage in .a letter-feedlng direction, escapement mechanism to control the carriage, and tabulating mechanism including means to release thecarriage from the escapement mechanism, of normally ineifective retarding means for the carriage rendered effective and independent of the carriage, saidTetaIding means comprising spring means ofleringslight resistance to the movement of the carriage and frictional means effective when the resistance of said spring means has been overcome. 7

9. In a typewriting machine, the combination with a carriage, means to urge the carriage in a letter-feeding direction, escapement mechanism to control the movementof the carriage, and tabulating mechanism ineluding means to release-the carriage from the escapement mechanism, of normally ineffective retarding means for the carriage renand a strong resisting device thrown into action at. the end of such preliminary movement. o

'10. In a typewriting machine, in combination. a carriage, carriage-urging means including a spring-drum, a retarding device connected with said drum, comprising two co-operating friction elements, one of which is connected with the drum so that the de.

vice normally rotates idly therewith, a controlling member, a. spring connection between said controlling member and the second element, and means to limit the movement betwenn said member and the second element, tabulating' mechanism, and means actuable by said tabulating mechanism to check said controlling-member, the second element then moving with respect thereto, until its limiting position with reference to the controlling member is reached, whereupon the movement of the carriage will be resisted by the friction between said elements;

11. In a typewriting machine, in combination,- a carriage, means to urge the carriage in a letter-feeding direction, a rotatable retarding device comprising two co-operating friction elements, one of which is connected with the carriage, so that the device will normally rotate idly during the/moves ment of the'carriage, tabulating mechanism,- and means actuable by the tabulating mechanism to check the movement of the second element, and thereby render said retarding device efiective on the carriage.

12.- lln a typewriting machine, in combination," a carriage, carriage-urging means including a spring-drum, a retarding device comprising two co-operating friction elements,one of which is secured to the drum so that the device will normally rotate idly therewith, a wheel, a spring connecting said wheel with the second element, and means to limit "the movement of said wheel with reference to said second element,'tabulatin mechanism, and means actuable by said tabulating mechanism to check the movement of said wheel, and therebyrender said device ett'ective, to restrain the spring-drum first by the resistance of said spring, and

later by the resistance due to relative movement between said friction elements.

13. In a typewriting machine, in combination, a carriage, carriage-urging means includmga spr1ng-drum, a retardin device comprising two co-operat1ng' friction elements, one of which is secured to the drum so that the device .will normally rotate idly therewith, and a ratchet-wheel yieldably connected to the second element and having .a limiting movement relative thereto, tabulating mechanism including a shaft extending transversel of the machine, an arm mounted on'sa-i shaft, and a pawl on the free end of said arm, whereby, upon actuation of said tabulating mechanism, the pawl will be shifted to engage said wheel and render the retarding device effective.

14. In a typewriting machine, in combination, a carriage, carriage-urging means including a spring-drum, a retarding device comprising two co-operatingfrict1on elements, one of which is secured to the drum so that the device will normallyrotate idly therewith, and a ratchet-wheel yieldably connected to the second element and having a limiting movement relative thereto, tabulating mechanism including a shaft extending transversely of the machine, an arm mounted on said shaft, and a pawl yieldably supported on the free end of said arm,

whereby, upon. actuation of said tabulating 'mechanism, the pawl will be moved towards said wheel to engage a tooth thereof, and, in case the pawl strikes the side of the tooth, it will yield and engage the next tooth when the, wheel is sufliciently advanced.

15. In a typewrlting machine, in combination, a traveling carriage, tabulating means therefor,-a retarding device for said carriage comprising two'friction elements, one of said elements consisting of a set of plates held against rotation with respect to each other but movable toward and from each other, the second of said elements consisting of a second set of plates alternating between the plates of the first set and held against relative rotation with respect to each vother but movable toward and from each other, means to adjust the pressure be tween said plates,and means rendered effective u on actuation of the tabulating means, where y movement of the carriage will cause relative movement between said friction elements, whereby the carriage will be correspondingly retarded.

16.,In a typewriting machine, in combination, carriage-urging means including a spring-drum, a retarding device comprising two co-operating friction elements, one of which is secured to the drum sothat the device will normally rotate idly therewith, a'wheel, a spring connecting said wheel with the second element, and means to limit the movement of said wheel with reference to said second element, comprising a stop on V the second element, a stop on said wheel normally held by said spring against the stopon. said second element, and an adjust able stop on said wheel in the path of the stop on the second element to limit the 17. In a typewriting machine, in combi nation, a traveling carriage, tabulating mechanism therefor, a retarding device for said carriage comprising two friction ele-' ments, one of said elements consisting'of a set of plates held against rotation with reference to each other but-movable toward and from each other, the second element consistmg of a secondset of plates alternating-between thev plates of the first set and held against relative rotation with respect to each other but movable toward and from each other, the second. element also including an outer plate supported at a fixed distance from the inner late of the second set, a wheel-coaxial wit said outer plate,-a spring tending-to rotate said wheel in one direction with reference to said outer plate, adjust-.-

able means to limit the movement of said wheel with reference to said outer plate, and means rendered effective u on actuation of the tabulating mechanism, w llereby movement of the carriage will effect relative movement between said wheel and said second friction element until said relative movement is stopped by the limiting means, and then will efiect relative movement between said friction elements.

In a typewriting machine, the combination with a letter-feeding carriage, of a propelling spring-drum connected to ,said

carriage, a set of co-operative brake-disks mounted on said drum to re'volvetherewith,

a carriage releasing and tabulatin gmechan ism, and an interponent set by said carriage-releaslng mechanism into position to prevent movement of certain of said brakedisks, PI'OVlSlOIl belng made for a certain advance of the released carriage before -movement of brake-disks is prevented by said interponent.

19. In a typewriting machine, a' carriage,

carriage-propelling means, a normally inefplurality of brake-disks mounted coaxially mechanism is first operatedand then to thereof includingadjustable:pa'rts and ad l 4 A tively rotatable friction-disks to a non-rotat- Jcause a frictional retardation of the sprin mount with thespring-drum and normallyin fixed relation thereto,

means operable to permit all of the brake-- and brake-controlling disks to turn in unison when fthe'tabu'lating cause certain of them to move relatively to the others. 7 v c 1 21. An article of manufacture for use in a typewriting machine,'comprising, 1n pom biuation a spring- "i h6 spring-drum,. a jplurality: oflfrictiondrum, j'a shaft fixed to mounted'on the shaft and-rotatable;

relatively to it-,'and means including a yield-' able partof the typewriter.

2- Ina type writin machine v p i g the relative movement between theco-opera- .tive'brake elements. I

drum, and a' brake mounted onthe front justing means on the front of thefbrake', said drum and brake bein removable from and insertable in'said macll 23. In a typewrlting machine, a carriage,

a'sprin'gdrum for propelling the carriage, 'an

a brake therefor arranged to m ovev idly as. an "'twith the drum, the brake compris-. ing" a epilurality of rotatable friction-disks on the drum- &axially therewith.

tab- V bination, acarrlage,

on and movingdly including a sprin g-drum, -means for spring-drummounted theremember ada ted to connect the -rela-',::

one of sai elements-against rotation to ine asaumt. V

mg device vfor said sprang-drum mountedi rotation of one of 24. In a typewriting machine, a typewriter-carriage, a spring-drum for propel-. ling the carriage, a brake for the spring-drum comprising friction disks in contact with each other, certain of the friction-disks being arched, and an adjustable member pressing against the disks for adjustably regulatin the pressure between the contacting faces of the disks.

25. In a typewriting machine, a carriage, 7 a spring-drum-for propelling the carriage, and a brake therefor arranged to move idly as a unit with the drum, the brake comprising relatively rotatable friction-disks, and means for adjustably regulating 'the pressureof the disks against each other.

26. In a typewriting machine, the com bination with a carriage, means including .a spring-drum to urge the carriage in a letter feeding direction, escapement mechanism to control the carriage and tabulating inechanism including means to release the carriage from the escapement mechanism, ofnormally ineffective retarding. means fastened to and moving with the spring-drum and rendered effective by said tabulating mechanism, said retarding means comprising springine'ans ofiering a slight resistance to the action of the spring-drum and frictional means effective when the resistance of said spring means has been overcome, and separate adjustablemeans for setting the range of action of the spring means and the force of the frictional retarding means.

27. In a typewriting machine, incom-.

feeding means therefor including. a spring-drum, and retarding means for said spring-drum mounted theretherewith, comprising I two co-operatmg friction elements, an means for causing relative -move ment between the co-o'peratrve elementsto create a 'frictionalretardation of the carriage.

28. In a typewriting machine, in combination, a carriage, feeding means therefor and retarding on and-moving 'id'ly therewith, comprising two co-operatin'g friction brake-elements,-ro-" inally engagin each other, and' means to mdrum, and hence of the carriage," througi 29. In a typewriting machine, in comto rotate idly therewith, comprisin two cooperating friction elements normally engaging each other, a carriage release, and means actuated'by the carriage release to arrest the said friction elementsto carriage-releasing device to arrest one of to co-operate with the other of'said members to retard the released carria e.'

33; In a typewriting machine, the combipower-driven carriage, co-Operative brake members revolving idly as the'car-" bmkg- 1 nfl and a part arranged to arrest including nation of a- .ter it has revolved a enabling the brake members to co-operate in vcause a relative movement between it and its co-operative element, creating a frictional retardation of the movement of the carriage.

30. In a typewriting machine, in combination, a carriage, carriage-urging means a spring-drum, a retarding device mounted on said drum, comprising two cooperating friction eleme'nts, one of which is secured to the drum so that the device normally rotates idly therewith, a. controlling member, means to limit the movement between said member and the second element, a carriage-releasin mechanism, and means a'ctuable by said releasing mechanism to arrest said controlling member, the second ele-,

ment then moving with respect thereto until its limiting position is reached, whereby further rotation of the drum will be resisted by the relative movement of the two frictionally-enga'ged elements.

31. In a typewriting machine, in combination, a carriage, carriage-urging means including a spring-drum, a retarding device comprising two co-operating friction brakeelements, one of which is secured to the drum so that the device will normally rotate idly therewith, a ratchet-wheel yieldably' connected to the second element and having'a limited movement relative thereto, a carriagerreleasing mechanism including a shaft extending transversely of the machine, an arm mounted on said shaft, and a pawl on the free end of said arm and associated with said releasing mechanism, and shiftable to arrest the wheel, so that the second element may move freely with respect to the wheel to a predetermined extent, and so that further rotation ofthe drum the two frictionally-engaged brake-elements. 32. The combination of a typewriter care usage, a spring to propel the same, feeding mechanism for the carriage, a carriage-re leasing device, co-operative brake members for said carriage, ed and connected riagemoves, and

said members both mountto revolve idly as the carmeans associated with said said co-operative brake members toenable it riage moves, and one of said co-'op'ei "ative brake members afpredetermined extent,

' retardingthe released carriage.

34. The combination of a typewriter car mechanism for the carriage, a carriage-releasing device, co -operative brake embers for said carriage, ed and connected to revolve idly as the earriage moves, means associated with car:

will be resisted bv feeding said members both-mount 'riage-releasing device to arrest one of said cooperative brake members toenable it tocooperate with the other of said members to retard the releasedcarriage, and adjustable means to set the-frictional power between the brake members. I

35. In a typewriting machine, the combis nation of a power-drivencarriage, co-operative brake members revolving idly as the carriage moves, a. part arranged to arrest oneof said co-operative brake members after it has revolved a predetermined extent, enabling the brake members to co-operate in retarding the released carriage, and means to adjustably set the extent of the free movement between the ating brake member.

36," In a typewriting machine, the combination with. a letter-feeding carriage, a source of power for propelling the same, and means for eflecting a jumping movement of the carriage, of eo-operative members connected to form a unit to revolve'idly as the carriage moves, and meansfor causing relative movement between 'said eo-operative members at the jumping movement of the carriage, to retard the latter.

37. In a typewriting machine, the combination with a letter-feeding power-driven carriage, and means for effecting a jumping movement of the carriage, of two co-operative friction brake-elements connected to form a unit to. revolve idly as the carriage moves, and means actuated at the jump movement of the carriage to engage one of the brake-elements, causing it to move relatively to its eo-operating element and creating thereby a cushioning action at the end of the jumping movement.

38. In a typewriting machine, the combination .with a letter-feeding power-driven carriage, and a jumping-movement mechanism for the carriage, of two co-operat-ing friction brake-elements andj'a control memments, whereby further movement of the en- 'tire unit will be resisted, due to the relative frictional movement between the moving the arrested break-element.

' 39; In a typewriting machine, the combination" with a letter-feeding power-driven carriage, of two co-operating friction elements and a ratchet-wheel'yieldably connected.together tofo'rm- 'aunit to revolve idly as the carriage moves, and a jumping-movement mechanism for the carriage, including a shaft, an arm mounted on the shaft, and a pawl on the free end of the arm, actuated at the jump movement to be shifted j ;toj.eng'age the wheeL and enable it to arrest part and its co-operdue to the relative frictional movement between the moving friction element and the arrested friction element.

40. In a typewriting machine, the com-' bination with a letter-feeding carriage, a source of power for propelling the same, and means for effecting a jumping movement of the carriage, of (lo-operative members connected to form a. unit to revolve idly as the carriage moves, means for causing relative movement between said co-opera'tive members at the jumpingmovement of the carriage, to cushion the latter, and other means to adjust the cushioning efiectat' the end of the jump movement independently of the eed of the carriage. 7

41. ,n a typewriting machine, the combination. of apower-driven carriage, cooperative brake-membersfor retarding the carriage, said members mounted as a unit to revolveidly as the carriage-moves, and adjustable means to set the frictional power between the brake-members independently of the speed of the carriage. V

BENJALHN MfDES JARDINS.

,MARION R. McCAnm-rr,

-Witnesse's: I

EDI-In B. LIBBnY, 

